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Simulation of a strategy for the pixel lensing of M87 using the Hubble Space Telescope

Sajadian, S ; Sharif University of Technology | 2012

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  1. Type of Document: Article
  2. DOI: 10.1111/j.1365-2966.2011.19671.x
  3. Publisher: 2012
  4. Abstract:
  5. In this paper, we propose a new strategy for the pixel-lensing observations of M87 in the Virgo cluster using theHubble Space Telescope(HST). In contrast to a previous observational strategy by Baltz et al., we show that a few days of intensive observations with the duration of ~90 min in eachHSTorbit will increase the observational efficiency of high-magnification events by more than one order of magnitude. We perform a Monte Carlo simulation for this strategy and we show that the number of high-magnification microlensing events will increase at the rate of 4.2 events per day with a typical transit time-scale of 16 h. We also examine the possibility of observing mini-halo dark matter structures using pixel lensing
  6. Keywords:
  7. Dark matter ; Galaxies: individual: M87 ; Gravitational lensing: micro
  8. Source: Monthly Notices of the Royal Astronomical Society ; Volume 419, Issue 1 , 2012 , Pages 124-131 ; 00358711 (ISSN)
  9. URL: http://mnras.oxfordjournals.org/content/419/1/124